Package: 25KGS/PP and PE BAG or by customer's request

Uses : textile-printing;food industry;tanning'pharmacy,Bleaching

Molecular Structure:

Product description: Sodium Metabisulfite: Appearance: White or light yellow crystalline power; Molecular Formula: Na2S2O5 CAS No.: 7681-57-4 Place of Origin: Hebei, China(Mainland) Spec: Item Standard Content 97.0% Min SO2 65.0% Min Na2S2O4 2.0% Max Insolubles In Water 0.05% Max Particle Size 85% (Mesh 200) pH 4.5 -5.5 Fe 5ppm max Heavy Metal 10 ppm max As 1 ppm max Main Uses: Textile-printing and dyeing: As Mordant of printing and dyeing; Dechlorinate textile after bleaching; As agent for textile's boiling-off; As Sulphonated agent and reducer. Pharmacy: Used to manufacture colorform\solasulfone\benzaldehyde etc; As Sulphonated agent and reducer. Tanning: Used for treatment of leather to soften the surface and make the leather waterproof\more tough\antiwear. Sensitization industry: Is served as the developing agent reductant and the protection of fixing bath dose and so on. Food industry: It is used as bleacher\antiseptic\leavening agent\antioxidant\color fixative\preservative etc. Waste Water Treatment: Used as an oxygen scavenger to eliminate the dissolved oxygen in waste water Mining: It is used for ore floatation. Sodium Metabisulfite is an in many beacher in many industries. It is used in beaching mechanical paper pulp, cotton, wool and kaolin clay. Packing: 25kgs/1MT/1.25MT per PP and PE bag